Thermoforming tubular articles
US4422999A · kind A · utility
16Cited by
9References
2Claims
0Family size
Inventor
Key dates
| Filing date | Dec 31, 1981 |
| Grant date | Dec 27, 1983 |
| Priority date | — |
| Expiry date | Dec 31, 2001 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C2071/022
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Tubular thermoformed articles are manufactured from tubular blanks which are heated to the annealing temperature for a time sufficient to anneal the articles by flowing hot liquid therethrough whilst constrained in the desire shape or form followed by flowing cold liquid therethrough to cool to set before being released from the constraint.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.